Thermal management of helix used in high-power high-efficiency traveling-wave tubes

V. Gahlaut, S.M. Sharma, P.A. Alvi and S.K. Ghosh

Journal of Electromagnetic Waves and Applications, 2013, vol. 27, issue 15, 1861-1868

Abstract: In this paper, an approach has been presented to estimate thermal contact resistance (TCR) between helix slow-wave structure to support rod and support rod to metal envelope to study the effective heat dissipation from the helix. Based on this method, TCRs are optimized by comparing analytically and experimentally estimated helix temperature with those obtained from ANSYS simulation. Helix temperature, at a given power loss in the helix, is obtained by varying the fraction of effective resistance between helix and support rod for a given fraction of effective resistance between support rod to barrel envelope and vice versa. This helix temperature has been compared with the measured temperature to predict the TCRs.

Date: 2013
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DOI: 10.1080/09205071.2013.823570

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